31206028512 has 96 divisors (see below), whose sum is σ = 89078748192. Its totient is φ = 9525510144.

The previous prime is 31206028493. The next prime is 31206028519. The reversal of 31206028512 is 21582060213.

It is a tau number, because it is divible by the number of its divisors (96).

It is a self number, because there is not a number n which added to its sum of digits gives 31206028512.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31206028519) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 198013 + ... + 318780.

It is an arithmetic number, because the mean of its divisors is an integer number (927903627).

Almost surely, 2^31206028512 is an apocalyptic number.

31206028512 is a gapful number since it is divisible by the number (32) formed by its first and last digit.

It is an amenable number.

31206028512 is an abundant number, since it is smaller than the sum of its proper divisors (57872719680).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

31206028512 is a wasteful number, since it uses less digits than its factorization.

31206028512 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 516860 (or 516852 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 30.

Adding to 31206028512 its reverse (21582060213), we get a palindrome (52788088725).

The spelling of 31206028512 in words is "thirty-one billion, two hundred six million, twenty-eight thousand, five hundred twelve".